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Notes:
With oil and water viscosity data (reservoir conditions), the fractional flow of oil can be determined. The three ester and corresponding alcohol tracer profiles offer two saturation points on the oil fractional flow curve. With residual oil data and connate water data (measured via separate SWCT tests) the complete fractional flow curve can be determined. Before the fractional flow SWCT test, connate water can be measured in the same pore space with a SWCT test carried out with an ester/product alcohol injected and produced in oil. After the fractional flow test is completed, the test zone can be watered out with a small water injection. After water injection, the residual oil end point is measured by a SWCT test for residual oil saturation carried out by injecting and producing an ester/product alcohol in water. Even without the residual oil and connate water end-points however, two oil fractional flow curve points are available from the fractional flow SWCT test data. The measured fractional flow points are on the water imbibition end of the oil fractional flow curve which is critical information for water-flood performance prediction.